delivered the opinion of the court.

In 1908 the city of South Pasadena, California, in pursuance of police power conferred by general law, passed an ordinance which prohibited any person from keeping or maintaining any hall or room in which billiard or pool tables were kept for hire or public use, provided it should not be construed to prevent the proprietor of a hotel using a general register for guests, and having twenty-five bedrooms and upwards, from 'maintaining billiard tables for the use of regular guests only of such hotel, in a room provided for that purpose.

The plaintiff in error was arrested on the charge of[*628] violating this ordinance. His application for a writ of habeas corpus -was denied by the Court of Appeals and Supreme Court of the State. In re Murphy, 8 Cal. App. 440; 155 California, 322. Thereafter the case came on for trial in the Recorder’s Court, where the defendant testified that, at a time when there was no ordinance on the subject, he had leased a room in the business part of the city, and -at large expense fitted it up with the necessary tables and equipments; that the place'was conducted in a peaceable and orderly'manner; that no betting or gambling or unlawful acts of any kind were permitted, and “that there was "no thing in the conduct of the business which had any tendency to immorality • or could in the least affect the health, comfort, safety or morality of the community or those who frequented said place of business.” This evidence' was', on motion,' excluded and testimony of other witnesses to the same effect was rejected.

The defendant was found guilty and sentenced to pay a fine, or in default thereof to be imprisoned in the county jail. The conviction was affirmed by the Superior Court of the County, the highest court to which he could appeal. The case was then brought here by writ of error, the plaintiff contending that the ordinance violated the provisions of the Fourteenth Amendment, claiming, in the first place, that in preventing him from maintaining a billiard hall it deprived him of the right to follow an occupation that is not a nuisance per se, and which therefore could not be absolutely prohibited.

The Fourteenth Amendment protects the citizen in his right to engage in any lawful business, but it does not prevent legislation intended to regulate useful occupations which, because of their nature or location, may prove injurious or offensive to the public. Neither does it prevent a municipality from prohibiting any ebusiness which is inherently vicious and. harmful. But, between the[*629] useful business which may be regulated and the vicious business which can be prohibited lie many non-useful occupations, which may, or may not' be harmful to the public, according to local conditions, or the manner in which they are conducted.

Playing at billiards is a lawful amusement; and keeping a billiard hall is not, as held by the Supreme Court of California on plaintiff’s application for habeas carpus, a nuisance per se. But it may become such; and the regulation or prohibition need not be postponed until the evil has become flagrant.

That the keeping of a billiard hall has a harmful tendency is a fact requiring no proof, and incapable of being controverted’ by the testimony of the plaintiff that his business was lawfully conducted, free from gaming or anything which could affect the morality of the community or of his patrons. The fact that there had been no disorder or open violation of the law does not prevent the municipal authorities from taking legislative notice of the idleness and other evils which result from the maintenance of a resort where it is the business of one to stimulate others to play beyond what is proper for legitimate recreation. The ordinance is not aimed at the game but at the place; and where, in the exercise of the police power, the municipal authorities determine that the keeping of such resorts should be prohibited, the courts cannot go behind their finding and inquire into local conditions; or whether the defendant’s hall was an orderly establishment, or had been conducted in such manner as to produce the evils sought to be prevented by the ordinance. As said in Booth v. Illinois, 184 U. S. 425, 429:

“A calling may not in itself be immoral, and yet the tendency of what is generally or ordinarily or often done in pursuing that calling may be towards that which is admittedly immoral or pernicious. If, looking at all the circumstances that attend, or which may ordinarily at-'[*630] tend, the pursuit of a particular calling, the State thinks that certain admitted evils cannot be successfully reached unless"that calling.be actually prohibited, the courts cannot interfere, 'unless, looking through mere forms and at the substance of the matter, they can say that the statute enacted professedly to protect the public morals has no real or substantial relation to that object, but is a clear, unmistakable infringement of rights secured by the fundamental law.”

Under this principle ordinances prohibiting the keeping of billiard halls have many times been sustained by the courts. Tanner v. Albion, 5 Hill. 121; City of Tarkio v. Cook, 120 Missouri, 1; City of Clearwater v. Bowman, 72 Kansas, 92; City of Corinth v. Crittenden, 94 Mississippi, 41; Cole v. Village of Culbertson, 86 Nebraska, 160; Ex parte Jones, 97 Pac. Rep. 570.

Indeed, such regulations furnish early instances of the exercise of the police power by cities. For Lord Hale in 1672 (2 Keble, 846), upheld a municipal by-law against keeping bowling alleys because of - the known and demoralizing tendency of such places.

Under the laws of the State, South Pasadena was authorized to pass this ordinance. After its adoption, the keeping of billiard or pool tables for hire was unlawful,' and the plaintiff in error cannot be heard to complain of the money loss resulting from having invested his property in an occupation which was neither protected by the state nor the Federal Constitution, and which he was bound to know could lawfully be regulated out of existence.

There is no merit in the contention that he was denied the equal protection of the law because, while he was prevented from so doing, the owners of a certain class of hotels were permitted to keep a room in which guests might play at the game. If, as argued, there is no reasonable basis for making a distinction between hotels‘ with 26 rooms and those with 24 rooms or less, the plaintiff[*631] in error is not in position to complain, because not being the owner of one of the smaller sort, he does not suffer from the alleged discrimination.

There is no contention that-these provisions, permitting hotels to maintain a room in which their regular and registered guests might play, were evasively inserted, as a means of permitting the proprietors to keep tables for hire. Neither is it claimed that the ordinance, is being unequally enforced. On .the contrary, the city trustees are bound to revoke the permit granted to hotels in case it should be made to appear that the proprietor suffered his rooms to •be used for playing billiards by other than regular guests. If he allowed 'the tables to be used for hire he would be guilty of á violation of the ordinance and, of course, be subject to prosecution and .punishment in the same .way, and to the same extent, as the defendant.

Affirmed.